allograph

noun

al·​lo·​graph ˈa-lə-ˌgraf 

1

: a letter of an alphabet in a particular shape (such as A or a)

2

: a letter or combination of letters that is one of several ways of representing one phoneme (such as pp in hopping representing the phoneme \p\)

allographic

ˌa-lə-ˈgra-fik 

adjective

Word History

Etymology

allo- + -graph, (in grapheme), on the model of allomorph : morpheme, allophone : phoneme

First Known Use

1951, in the meaning defined at sense 1